[yunong]

"I think it's readily known that Microsoft has numerous zero-days (discovered or not) in their software."

This is true for every single piece of software ever written. Msft is no different in this regard.

[ryanlol]

I don't think it's fair to say "every single piece of software", as the claim that it's impossible to write secure software is just a myth. It's not very hard to write a secure "hello world".

Then there's also Coq and such.

Of course, usually the amount of vulnerabilities exponentially correlates to the size of the codebase.